I have first generation vitz 1.0 L , Recently the car has stopped shifting gears , Otherwise everything else is fine , the car is still running. It mainly happened after I got the car tuned from a mechanic .. Now the mechanic says that the gear box is broken and will need a replacement.

Is there any vitz expert mechanic where I can get this checked in lahore ? Johar town , faisal town or peco road ?